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A Robotic Platform to Study the Foreflipper of the California Sea Lion
Published on: January 10, 2017
8.2K
Variable stiffness morphing limb for amphibious legged robots inspired by chelonian environmental adaptations
Robert Baines1, Simon Freeman, Frank Fish
1Department of Mechanical Engineering & Materials Science, Yale University, 10 Hillhouse Avenue, New Haven, CT 06520, United States of America.
Bioinspiration & Biomimetics
|January 9, 2020
Summary
This study introduces a morphing robotic limb that mimics sea turtles and tortoises. This adaptable design enhances locomotion performance for amphibious robotic vehicles in both water and on land.
Area of Science:
- Robotics
- Biomechanics
- Materials Science
Background:
- Amphibious robotic vehicles face challenges in optimizing propulsion for both aquatic and terrestrial environments.
- Existing designs often compromise performance in one medium to achieve functionality in another.
Purpose of the Study:
- To develop a novel morphing amphibious robotic limb that integrates the distinct locomotor adaptations of sea turtles (swimming) and tortoises (walking).
- To enhance the locomotive efficiency and performance of a single robotic design across both aquatic and terrestrial terrains.
Main Methods:
- Fabrication of a morphing robotic limb utilizing variable stiffness materials and a pneumatic actuator system.
- Characterization of the limb's transformation between a streamlined flipper (sea turtle adaptation) and a load-bearing leg (tortoise adaptation).
- Quantitative analysis of locomotive performance enhancement through morphing between hydrodynamic and axial-load bearing states.
Main Results:
- Successful fabrication and characterization of a morphing amphibious robotic limb.
- Demonstration of the limb's ability to transition between sea turtle-like flipper and tortoise-like leg morphologies.
- Quantitative evidence showing improved locomotive performance in both aquatic and terrestrial environments due to the morphing capability.
Conclusions:
- The developed morphing amphibious robotic limb effectively integrates adaptations for both swimming and walking.
- This biomimetic approach offers a significant advancement in enhancing the versatility and performance of amphibious robots.
- The morphing limb presents a viable solution for overcoming the dual-environment locomotion challenges faced by robotic vehicles.
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